• 文献标题:   Trapping and Guiding Surface Plasmons in Curved Graphene Landscapes
  • 文献类型:   Article
  • 作  者:   SMIRNOVA D, MOUSAVI SH, WANG Z, KIVSHAR YS, KHANIKAEV AB
  • 作者关键词:   graphene plasmon, curvature, trapping potential
  • 出版物名称:   ACS PHOTONICS
  • ISSN:   2330-4022
  • 通讯作者地址:   CUNY Queens Coll
  • 被引频次:   20
  • DOI:   10.1021/acsphotonics.6b00116
  • 出版年:   2016

▎ 摘  要

We demonstrate that graphene placed on top of curved substrates offers a novel approach for trapping and guiding surface plasmons. Monolayer graphene with a spatially varying curvature exhibits an effective trapping potential for graphene plasmons near curved areas such as bumps, humps, and wells. We derive the governing equation for describing such localized channel plasmons guided by curved graphene and validate our theory by first-principle numerical simulations. The proposed confinement mechanism enables plasmon guiding by the regions of maximal curvature, and it offers a versatile platform for manipulating light in planar landscapes. In addition, isolated deformations of graphene such as bumps are shown to support localized surface modes and resonances, suggesting a new way to engineer graphene-based metasurfaces.